A toxicology report from the Pima County Medical Examiner has confirmed the 21-year-old’s cause of death.

After initial reports from the Pima County medical examiner's office speculated that Lil Peep had passed away from an overdose, a toxicology report has confirmed that the artist, real name Gustav Åhr, died from overdosing on Xanax and Fentanyl, TMZ reports. Fentanyl, the powerful synthetic opioid, can be 50 to 100 times more potent than morphine and has lead to an epidemic of overdoses in the past decade, including Prince's death in 2016.

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Lil Peep died on November 15 in Tucson, Arizona, where he was scheduled to perform as part of a tour in support of his debut album, Come Over When You're Sober (Part One). He was 21. At the end of November, TMZ reported that law enforcement was investigating the involvement of Fentanyl in Peep's death.